Upgrade from kernel 3.1.9 to 3.2.1 eGalax usb touchscreen device is no 
longer recognised.

Device is an Acer Iconia Tab w501 with inbuilt touchscreen. Screen is a 
pci device but is connected on boot as a usb input device. Issue appears 
to be with either UDEV or USBINPUT boot hook failing to recognise the 
device as can be seen in the dmesg.3.2.1 attachment.

Downgrading to kernel 3.1.9 corrects the issue.

Please see attached files for comparative information between kernel 
versions - using x86_64.

Attachments:

1. Processor
     cpuinfo

2. Kernel 3.1.9:
     dmesg.3.1.9 ($ dmesg | grep eGalax)
     lspci.3.1.9 (# lspci -vvv)
     xinput.list.3.1.9 ($ xinput list)
     xorg.log.3.1.9 (/var/log/Xorg.0.log)

3. Kernel 3.2.1:
     dmesg.3.2.1 ($ dmesg | grep "usb 5-")
     lspci.3.2.1 (# lspci -vvv)
     xinput.list.3.2.1 ($ xinput list)
     xorg.log.3.2.1 (/var/log/Xorg.0.log)

Please CC me into discussion on this issue.

Happy to provide any further information you require.

Cheers.
Lachlan.